Function PlaceTreeAtSameHeight

src/tree_cmd.cpp:330–352

* Place a tree at the same height as an existing tree. * * Add a new tree around the given tile which is at the same * height or at some offset (2 units) of it. * * @param tile The base tile to add a new tree somewhere around * @param height The height (like the one from the tile) */

 * @param height The height (like the one from the tile)
 */
static void PlaceTreeAtSameHeight(TileIndex tile, int height)
{
	for (uint i = 0; i < DEFAULT_TREE_STEPS; i++) {
		uint32_t r = Random();
		int x = GB(r, 0, 5) - 16;
		int y = GB(r, 8, 5) - 16;
		TileIndex cur_tile = TileAddWrap(tile, x, y);
		if (cur_tile == INVALID_TILE) continue;

		/* Keep in range of the existing tree */
		if (abs(x) + abs(y) > 16) continue;

		/* Clear tile, no farm-tiles or rocks */
		if (!CanPlantTreesOnTile(cur_tile, true)) continue;

		/* Not too much height difference */
		if (Delta(GetTileZ(cur_tile), height) > 2) continue;

		/* Place one tree and quit */
		PlaceTree(cur_tile, r);
		break;
	}
}

/**
 * Place some trees randomly